Time to go FAST

This is it! The FAST EZ EFI Fuel injection system! It's really easy to install, I just have to figure out the ignition system (I need to find the negative side of the ignition coil... which MUST be the ground wire since there is no other wire on an HEI. I can't use the Tach pin for the function.)
The only hiccup is I gotta install a fuel return line to the gas tank. That's gonna be a pain...
Otherwise the rest is basic. I already have the oxygen sensor bung in place. Screw in the oxygen sensor, install the fuel pump, hook up the manifold temp sensor (Just a screw in deal), and hook up the power lines. Then you hook up that little dealie on the lower right and it asks questions about your engine, then fire it up and let it get warm... and drive the piss out of it. (More questions come I think but you get the idea.)
Only things got me a bit nervous are the fuel return line and the negative side of my HEI coil.